389911979701 has 4 divisors (see below), whose sum is σ = 391289760832. Its totient is φ = 388534198572.

The previous prime is 389911979693. The next prime is 389911979711. The reversal of 389911979701 is 107979119983.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 389911979701 - 2³ = 389911979693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389911979711) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 688890141 + ... + 688890706.

It is an arithmetic number, because the mean of its divisors is an integer number (97822440208).

Almost surely, 2^389911979701 is an apocalyptic number.

It is an amenable number.

389911979701 is a deficient number, since it is larger than the sum of its proper divisors (1377781131).

389911979701 is a wasteful number, since it uses less digits than its factorization.

389911979701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1377781130.

The product of its (nonzero) digits is 7715736, while the sum is 64.

The spelling of 389911979701 in words is "three hundred eighty-nine billion, nine hundred eleven million, nine hundred seventy-nine thousand, seven hundred one".